Gas-engine reversing-gear.



PATENTED JUNE 9; 1905'.

M. H. NEEE. GAS ENGINE REVERS'ING GEAR.

APPLICATION FILED OUT. '1, 1902.

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14 VENTOR WITNESSES:

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noams PETERS cn, PNOTOLITHD,WA$ 1IN No. 730,683. PATENTED JUNE 1903.

t M. H. NEFP.

GAS ENGINE RBVERSING GEAR.

APPLIUATION FILED OUT. 7, 1902.

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UNITED STATES iatented June 9, 1963.

PATENT ()FFICE.

GASLENGINE RZEVERSING-G EAR.

SPECIFICATION formingpart of Letters Fatent No. 730,683, dated une 9, 1903.

Application filed October '7, 1902.

ments in reversing-gears in which the igniter,

being actuated by an eccentric on the engineshaft, is moved so that its positionon the shaft is changed, thus changingthe moment of action of the igniter so as to catch the engine on the turn, and thus reverse its movement.

The invention resides in certain peculiar features of construction and arrangement of parts adapted to a reversing-gear of this class, alfl of which will be fully described hereina ter.

This specification is an exact description of several forms of my invention, while the claims define the actual scope thereof.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a side view of a double-cylinder engine to which my invention is shown as applied. Fig. 2 is an end view showing the parts adjacent to the igniter. Fig. 3 is a plan view of the swinging flattened arm. Fig. 4 is a view of a modified form of the invention. Fig. 5 is a view of a second modification in which only one eccentric is employed, and Fig. 6 is a view of the igniter-operating rock-shaft used with the construction shown in Fig. 5.

(1 indicates the two engine-cylinders, ct the crank-cases, and a the engine-shaft, in each end of which is formed a diagonal slot Eccentrics b are mounted, respectively, on the ends of the shaft and have vpins'b, which run in the said diagonal slots a These eccentrics turn with the shaft and are capable of being moved spirally around the shaft, following the form of the grooves 0. thus shifting the relation of the eccentric to the shaft in a manner which will be fully understood from the prior art. Connected to each eccentric is a grooved collar b", and with these Serial No. 126,310. (No model.)

collars forks c are loosely engaged. Said forks are fastened on a shaft 0, which is mounted in bearings c and slides in parallelism with the engine-shaft a 01 indicates a hand-lever fulcrumed on the engine-frame and working with a quadrant d and pawl (1 as shown. This lever d is connected through the medium of a crosshead d with the shaft 0, said cross-head being also connected with a sliding shaft 6, mounted abovethe shaft 0 in boxes 6 and arranged to slide longitudinally in parallelism with the engine-shaft. By the action of the lever d the shafts c and e are operated simultaneously and arethrown to one or the other side of the engine.

findicates the eccentric-rods, which are one for each eccentric and which extend upward to and have pivotal connection with the under side of a flattened rocker-arm g. These arms'g are mounted to rock and also to slide on stub-shafts 'g, projecting from the opposite sides of the engine, and each of said flattened arms is provided with a notch g at its hub, in which are fitted the forked ends e of arms 6 fastened, respectively, to the ends of the shaft 6. The sliding movement of the shaft 6 will, through the medium of the arms 6 impart a like movement to the flattened rocker-arms g, and thus these arms will be shifted sidewise inunison with the shifting of the eccentrics.

It indicates the shafts, which are rocked to operate the igniters, and said shafts have arms h attached thereto, these arms carrying downwardly-projecting pins 71. which bear on top of the flattened rocker-arms g. The parts h and k are not adjustable in time with the eccentric; but the adjustment of the eccentric, carrying with it the adjustment of the flattened arms 9, does not prevent the proper action of the eccentric on the rockshafts h, owing to the flattened form of the arms 9. The width of these arms is sufficient to keep them always engaged with the arms 71 notwithstanding that said arms 9 may be shifted sidewise to the same extent that the eccentrics are moved.

In the operation of the invention the parts are adjusted as shown, and assuming that it be desired to reverse the engine the lever dis thrown so as to change the position of the eccentrics b. This causes a change in the movement of the arms and thus the operation of the eccentrics is delayed or accelerated, as may be the case, so as to reverse the movement of the engine, all of which will be fully understood from the prior art.

The modification shown in Fig. 4:, consists in providing a sliding pin 2' in place of the pin h this pin 2' being mounted in the guide 2', attached to the engine-cylinder, and hav ing a laterally and outwardly disposed end 1?, taking the place of the swinging arm g. With this end i the eccentric-rod fis slidably engaged,so that the lateral movement of the eccentric-rod, due to the change of position of the eccentric, does not affect the connection between the parts fand t'. The shaft e may or may not be in connection with. the aperture of the eccentric-rod f. It is preferred, however, to have a sliding connection between this rodfand said shaft e.

The modification shown in Fig. 5 involves the use of one eccentric merely. In Fig. 5, a indicates the engine-cylinders, and (t the en gine-shaft, the same as in Fig. 1. ct indicates the crank-cases. The single eccentric b is mounted on the shaft a the same as in the other form of the invention, and the fork c is connected to a sliding shaft 0 which takes the place of the shaft 0. This shaft 0 is connected, by the cross-head d ,with the handlever d, the same as before, and 6 indicates a sliding shaft taking the place of the shaft 'e. Said shaft e carries a crank 6 having a forked end engaged with a grooved sleeve 70, to which is attached the eccentric-rodf. Said sleeve 76 slides on the wrist-pin Z of a rockshaft Z, mounted in bearings Z attached suitably to the engine. Now it will be seen that by 1h rowing the lever d to shift the eccentric through the action of the parts (Z 0 and c the shaft 6 will also be thrown to shift the sleeve on the wrist-pin Z, and thus all of the parts 19,), and 7c are shifted in unison without disturbing the connection of the cocentric with the rock-shaft Z. The shaft Z has a crank Z at each end, one of these cranks being that to which the beforementioned wrist-pin Z is attached. (See Fig. 6.) The cranks Z are respectively connected with the rods m, which extend upward and engage with the igniters in the usual or any desired manner.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. The combination with an eccentric shiftable for the purpose specified, of a sliding member in connection with the eccentric to shift it, an eccentric-rod, means for transmitting the movement of the eccentric-rod, such means including a part shiftable in time with the eccentric, a second sliding member transmitting the movement of the eccentric,-

said means including a part shiftable in unison with the eccentric, and means for Shift". ing the eccentric and said shiftable part si multaneously and in unison.

3. The combination of an eccentric shiftable for the purpose specified, means for imparting the movement of the eccentric, said means including a part shiftable in time with the eccentric, two sliding shafts respectively having connection with the eccentric and said shiftable parts, and means for moving the shafts in unison.

4. The combination of an eccentric shiftable for the purpose specified, an eccentricrod, a swinging arm having connection with the eccentric-rod and arranged to be shifted in unison with the eccentric, a member engaged by the arm to be operated therefrom, and means for shifting the eccentric and arm in unison.

5. The combination of an eccentric shiftable for the purpose specified, an eccentricrod, a swinging arm having connection with the eccentric-rod and arranged to be shifted in unison with the eccentric, a member engaged by the arm to be operated therefrom, and means for shifting the eccentric and arm in unison, said arm being flattened transversely so that its shifting movement will not disengage it from the devices operated by the arm.

6. The combination of an eccentric shiftable for the purpose specified, an eccentricrod, a flattened swinging and sliding arm with which the rod is connected, means engaged by the arm to be operated therefrom, a sliding shaft, an arm attached to the sliding shaft and having connection with the said flattened arm, means having connection with the eccentric to move it, and a manuallyoperative device connected with the sliding shaft and with the said meanshaving connection with the eccentric, to operate said elements in unison.

7. The combination of an eccentric shiftable for the purpose specified, an eccentricrod, a swinging and sliding arm connected to the eccentric-rod and flattened for the purpose specified, and means for shifting the eccentric and sliding the arm in unison.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

MILTON H. NEFF.

Witnesses:

F. W. HANAFORD, EVERARD BOLTON MARSHALL. 

